Photographic shutter



July 14, 1936. A. BARENYI PHOTOGRAPHIC SHUTTER Y Filed May 17, 1935 2 Sheets-Sheet 2 .ly/11111110' lll/1 Patented July 14, 1936 uru'riazo STATE Pno'roGnArmc snU'r'rEa Barnyi, Berlin-Lichterfelde,

to Voigtlnder & Sohn Aktiengesellassignor Germany,

schaft, Brunswick, Germany, a joint-stock company of Germany Application In 12 Claims.

My invention relates to improvements in photographic shutters, and more particularly in the type of pivoted blade, symmetrical opening shutter comprising a blade mechanism and a s'pring driven motor or master member which when set and released rotates the blades for opening and closing the-shutter. More particularly my invention relates to mechanism cooperating with the motor or master member for controlling the opening and closing movements of the blades and -:amprising a train of gear wheels'adapted to be engaged by the motor or master member, the said mechanism comprising elements adapted to be set in different positions relatively to the motor or master member for regulating the retarding action. In mechanisms of this type such as are now in use the train of gear wheels and cooperating devices are set into operative position by the setting operation of the motor or master member. One of the objects of the improvements is to provide a retarding mechanism which is l adapted to be set into positions of different retarding effects independently of the motor or master member, and with this object in view my invention consists in providing a hand-operated member independent oi the shutter operating mechanism for setting the retarding mechanism in diierent positions relatively to the shutter operating mechanism. Thus the retarding mechanism is adapted to be set into the position corresponding to the desired time of exposure in any position oi the motor or master member. When y the retarding mechanism is thus set the resistance opposed thereby to the movement of the hand-operated member is high, and another object of the improvements is to construct the -mechanism so that the resistance of the retarding mechanism is reduced during the setting operation thereof. With this object .in view my invention consists in combining the hand operated setting device with means for rendering a part of the retarding mechanism inoperative before the setting operation begins. Where the retarding mechanism comprises a star wheel and an anchor thev star wheel is mounted so that it is adapted to be retracted from the anchor before setting tallesv place. As the resistance opposed to the movement by the said anchor is comparatively large, the resistance of the retarding mechanism is considerably reduced by thus throwing the anchor out of engagement withA the atar wheel.

Other objects of the improvements from the following description. 56- I'or the purpose of explaining the invention will appear tion.

May 17, 1935, Serial No. 22,046 Germany May 24, 1934 two examples embodying the same have been shown in the accompanying drawings in which the same reference characters have been used in all the views to indicate corresponding parts. In

said drawings,

Fig. 1 is a fragmentary elevation of the shutter, the front wall of the shutter casing being removed to show the motor or master member and the retarding mechanism,

Fig. 2 is a development partly in section of 10 Fig. 1,

Fig. 3 is an elevation similar to the one illustrated in Fig. 1 and showing the parts in a diierent position,

Fig. i is a sectional plan view taken on the line 15 4-4 of Fig. 3,

Figs. 5 to 8 are sectional elevations taken on the. lines 5-5, 6-.6, 'l-1 and -Bof Fig. 1, and

Fig. 9 is a fragmentary elevation similar to the one illustrated in Fig. 1 and showing a modiilca- 20 In the example shown in Figs. 1 to 8 the shutter comprises the usual annular casing I having a central exposure or lens opening 2 normally closed by blades (not shown). Upon an annular 25 plate' 3, most of the shutter operating mechanism including a motor or master member 4 and the retarding mechanism thereof is carried. These devices are known vin the art and therefore a brief description of the main parts is suilicient. 30 The shutter operating mechanism'including the motor or master member has a construction similar to the one described in the patent of the United States, No. 1,828,215, granted to me November 20, 1931, and it comprises a setting lever 5 the arbor 6 of which is locked in set position by a pawl 1 engaging a shoulder of a disk 8. and a spring housing 9 which is formed with a lug I0 engaged by a latch II connected with the shutter releasing mechanism, the said lug being adapted when the housing is released for operating the shutter to engage a lever I2 mounted on i a pivot bolt I3 and forming a part of the retarding mechanism. As shown the said lever .is formed with a heel I4 which is in the path of the lug I0, and at its opposite end it is formed with a toothed segment I5 meshing with a pinion I6. The said pinion is connected through a train of gear wheels I8, I9, 20, 2|, 22, 23 with a star wheel 24 engaged by a rockingly mounted anchor 25. The lever I2, the pinions and gear wheels I0, I8, I9, 20, 2| and 22 and the anchor 25 are mounted on pivot bolts which are fixed to the plate 3. But the pivot bolt 26 oi the star wheel 24 and the lpinion 23 is mounted on one arm'of a bell crank platel 3, and the said ring is formed with a cam.

slot 32 engaged by a pin 33 of a lever 34. The lever 34 is in loose engagement with a pin 35 carried by the lever I2. Thus when the ring 30 is turned the pin 33 of the lever 34 is shifted outwardly or inwardly within the cam slot ,32, and thereby the left hand arm of the lever 34 turns the lever I2 more or less for setting the heel I4 in different positions circumferentially of the motor or master member 4 and the path of its lug I0. The lever I2 is acted upon by a spring 35 .tending to hold the pin 35 in engagement with the lever 34.'

Rotary movement is imparted to the ring 30 as follows: The said ring is formed with teeth 3l! which are in engagement with a pinion 38 carried by a pivot bolt 39 rotatable in the plate 3. To the pivot bolt 39 a4 milled disk 40 is secured which projects with a portion of its circumference beyond the circumference of the shutter casing so that it may be readily engaged by the finger of the photographer for imparting rotary movement thereto and shifting the ring 30. As appears from liigs. 2 and 5, the milled disk 40 comprises two sections 401 and 4I)2 which are spaced from each other. and between the said sections a substantially semi-circular lever 43 is located which projects outwardly from the shutter casing and be yond the circumference of the disk 4 0, and which is mounted on a pivot bolt 4 I. 'I'he free end 42 of the lever 43 engages in a bore or notch 45 made in a plunger 46 embedded and radially slidable in a cylindrical housing 41 formed in the shutter casn ing, a spring 48 tending to push the plunger 46 outwardly. To the plunger a pin 49 is fixed which is passed through a slot 50 made in the wall of the housing 41 for limiting the outward movement of the plunger. The pin 49 isy also in engagement with a lever 52 mounted on the pivot bolt 39 and formed at its end with a slot 53, and the said slot engages a pin 54 carried by the lever 21.

'I'he ring 30 is formed with notches 55 which arresting the ring 30 in its position.

The operation of the device is .as follows: If it is desired to make an exposure the' desired time of exposure is first set, and for this purpose the ring 30 is turned, so'that the pin 33 of the lever '-34 rides on the cam,i'ace of the slot 32 and turns the lever I2 clockwise into the position corresponding to the portion of the cam face engaging the pin 33. Therefore, when -afterwards the motor or master member 4 is released its lug I0 impinges upon the heel I4 at an earlier or later moment. Thus the movement of the shutter mechanism is retarded more or less according to the position of the lever I 2 and the ring 30.

Rotary movement is imparted to the ring 30 by means of themilled disklll, and when the photographer engages the said disk with his finger he must rst press the lever 43 inwardly against i the action of the spring 48, and such inward movement is transmitted through the lever 52 to lcnc lever 21 which is thereby turned clockwise and in a direction for' retracting the star wheel 24 away from the anchor 25., .and this is done before for' imparting rotary movement to the ring 30 and setting the lever I2 into the desired position, only the train of gear wheels need` be rotated, while Y,

the star wheel 40'is out of engagement therewith. Thus the resistance opposed to the movement of the lever I2 is reduced.

When the milled disk 4l) is released the spring 48 returns the star wheel 24 into initial position through the intermediary of the plunger 46, the lever 52, and the bell crank lever 2'11. Therefore when the spring housing of the motor or master member vis released for-operating the shutter the retarding mechanism has its full action.

Figs. 1 and 2 show the star wheel 24 in operan tive position and Figs. 3 and 4 show the said star wheel retracted from its anchor and in inoperative position.

In Fig. 9 I have shown a modification in which the construction of the retarding mechanism, its star wheel, the setting disk and the milled disk for operating the same is the same as has been described with reference to Figs. 1 to 8, and the same letters of reference have been used to indicate corresponding parts. However, the mechanism for retracting the star wheel away from the anchor is constructed in a different Way. As shown in the said figure in lieu of the spring latch 56 engaging in the notches 55 of the disk 30 for locking the same in position a lever 10 is provided which is mounted on a pivot bolt 1I, and which is normally pressed into locking engagement with one ofthe notches of the disk 30 by a leaf spring 12. The rear end of the said. lever is formed with a flat portion 13 which bears on the rear end of a lever 14 which is rockingly mounted at 15, and which carries the pivot bolt 26 of the star wheel 24. If now the ring 30 is turned by means of the milled disk 40 for setting the lever I2 intov the desired position through the intermediary .of the lever 34 and the cam slot 32, the nose of the lever 10 gets out of engagement with the notch 55, and it is turned clockwise thereby and in a ldirection for causing the lever 14 to retract the star wheel 24 away from the anchor 25.

From the foregoing description of the invention it will be understood that the housing of the spring motor or master member and the shutter operating mechanism are retarded in different Ways by setting the lever I 2 in different positions relatively to the latch I0, and that such setting movement of the lever I2 may be performed when the spring motor or vmaster member is in set position or in the position before setting.

I claim: c

1. In a photographicshutter, the combination,

with shutter operating mechanism, of retardingV retardlng mechanism is set and inoperative thereafter for disconnecting one member of the retarding mechanism from the other one.4

3. In a photographic shutter, the combination, with 'the shutter operating mechanism, of'retarding mechanism cooperating with said shutter operating mechanism and comprising a gearing and a star wheel and its anchor, means for ing mechanism cooperating with said shutter operating mechanism, means for setting said retarding mechanism into positions of diierent retarding effects, and means connected with said setting means and operative at the beginning and inoperative at the end of the operation thereof for reducing the resistance of said retarding mechanism. o

5. A photographic shutter as claimed in claim 4, in which the retarding mechanism is made in two sections, and in which the means for reducing the resistance of the retarding mechanism is constructed for throwing one of said sections out of operation.

6. A photographic shutter as claimed in claim 4, in which the meansor setting the retarding mechanism in diii'erent positions take the form of a hand-operated disk, and in which means controlled by said disk are provided for reducing the resistance of said retarding mechanism.

7. A photographic shutter, comprising the shutter operating mechanism, retarding mechanism cooperating therewith, a shiftable member connected with said retarding mechanism and adapted to set the same into positions of diierent retarding effects, a member adapted to be operated by hand for shifting said shiftable member, and means located close to said hand-operated member in position for being engaged simultaneously therewith by the hand for reducing the resistance of said retarding mechanism.

8. A photographic shutter as claimed in claim 7, in which the hand-operated member comprises a disk made in two sections spaced from each other and located axially beside each other, and in which the said means for reducing the resistance comprises a lever located between the said sections and normally projecting therefrom outwardly.

9. In a photographic shutter, the combination, with shutter operating mechanism, of retarding mechanism cooperating therewith, a hand-operated shiftable member cooperating with said retarding mechanism and adapted to set the same into positions of diierent retarding eii'ects, and means controlled by said shiftable member and operative at the beginning of the shifting movement thereof for reducing the resistance of said retarding mechanism.

10. In a photographic shutter, the combination, with shutter operating mechanism, of retarding mechanism cooperating with said shutter operat- 5 ing mechanism, a hand-operated shiftable member cooperating with said retarding mechanism and adapted to set the same into positions of different retarding effects, said shiftable member being formed with a cam face, a member engaging said cam face and adapted when said shiftable member is shifted to be rockedthereby, and

-means connected with said member for reducing the resistance of said retarding mechanism.

11. In a photographic shutter, the combination, 15 with shutter operating mechanism, of retarding mechanism cooperating therewith, a hand-oper- 4 ated shiftable member cooperating with said re tarding mechanism and adapted to set the same into positions of different retarding eects, said 20 retarding mechanism comprising a plurality of retarding members, and said shiftable member being formed ywith notches, a rockingly mounted lever engaging one of said retarding members and adapted to throw the-same into and out of re- 2,5 tarding position, and a locking lever adapted for engagement with said notches cf the shiftable member for locking the same in position, ,said locking lever being adapted to be rocked out of engagement with the notches by the shifting 30 movement of said shiftable memberand when thus rocked to rock said lever adapted to throw said member of the retarding mechanism out of retarding position.

12. In a photographic shutter, the combination, 35 with shutter operating mechanism, of retarding mechanism cooperating with said-shutter operating mechanism, a hand-operated shiftable member cooperating with said retarding mechanism and adapted to set the same into positions of different retarding eiects, said retarding mechanism comprising a star wheel and its anchor, a rockingly mounted member on which said star wheel is mounted and adapted to be rocked with/ said star wheel into and out of engagement with 45 the remainder of said retarding mechanism, said shiftable member being formed with notches, and a lever adapted to engage said notches for locking said shiftable member in` position and to be rocked by the shifting movement of said shiftable member, said lever being in engagement with said member and adapted to rock the same with the star wheel carried thereby out of engagement with the remainder of the retarding mecha` nism.

l 55 ARPAD BABNYI. 

